Association of sleep bruxism with oral health-related quality of life and sleep quality



To compare the oral health-related quality of life (OHRQoL) and sleep quality of subjects with and without sleep bruxism (SB).

Materials and methods

Participants of both genders were assigned as bruxers (n = 30, age 21–45 years) and non-bruxers (n = 30, age 24–40 years). SB was clinically diagnosed and confirmed with an electromyography/electrocardiograph portable device (Bruxoff). The OHRQoL was assessed using the Oral Health Impact Profile (OHIP-14). The sleep quality was determined using the Pittsburg Sleep Quality Index (PSQI) and Epworth Sleepiness Scale (ESS) questionnaires. OHIP-14, PSQI, and ESS data were analyzed by one-way ANOVA, considering a significance level of 5%.


Bruxers had worse OHRQoL (mean = 16.43) than controls (mean = 4.1), with an effect size (ES) of 1.58. Moreover, SB volunteers showed the highest PSQI scores (mean = 7.07; ES = 0.82) and excessive daytime sleepiness (mean = 10.33; ES = 0.65), compared to non-bruxers (means = 4.7 and 7.8, respectively).


SB may be associated with a negative impact on OHRQoL and sleep quality.

Clinical relevance

Determining that SB may have a marked role in OHRQoL and sleep quality is important for dental professionals establish proper multifactorial management, and understand patient-related psychosocial aspects.

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This study was supported by the São Paulo Research Foundation (FAPESP, grant numbers 2015/14662-0 and 2015/21704-1), Brazil.

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Corresponding author

Correspondence to Renata Cunha Matheus Rodrigues Garcia.

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The authors declare that they have no conflict of interest.

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All procedures in this research were performed in accordance with the ethical standards of the Ethics Committee of Piracicaba dental School, University of Campinas, and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.

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Informed consent was obtained from all individual participants included in the study.

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Câmara-Souza, M.B., de Figueredo, O.M.C. & Rodrigues Garcia, R.C.M. Association of sleep bruxism with oral health-related quality of life and sleep quality. Clin Oral Invest 23, 245–251 (2019).

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  • Sleep bruxism
  • Quality of life
  • Sleep